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Diss Factsheets
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EC number: 217-703-5 | CAS number: 1934-75-4
- Life Cycle description
- Uses advised against
- Endpoint summary
- Appearance / physical state / colour
- Melting point / freezing point
- Boiling point
- Density
- Particle size distribution (Granulometry)
- Vapour pressure
- Partition coefficient
- Water solubility
- Solubility in organic solvents / fat solubility
- Surface tension
- Flash point
- Auto flammability
- Flammability
- Explosiveness
- Oxidising properties
- Oxidation reduction potential
- Stability in organic solvents and identity of relevant degradation products
- Storage stability and reactivity towards container material
- Stability: thermal, sunlight, metals
- pH
- Dissociation constant
- Viscosity
- Additional physico-chemical information
- Additional physico-chemical properties of nanomaterials
- Nanomaterial agglomeration / aggregation
- Nanomaterial crystalline phase
- Nanomaterial crystallite and grain size
- Nanomaterial aspect ratio / shape
- Nanomaterial specific surface area
- Nanomaterial Zeta potential
- Nanomaterial surface chemistry
- Nanomaterial dustiness
- Nanomaterial porosity
- Nanomaterial pour density
- Nanomaterial photocatalytic activity
- Nanomaterial radical formation potential
- Nanomaterial catalytic activity
- Endpoint summary
- Stability
- Biodegradation
- Bioaccumulation
- Transport and distribution
- Environmental data
- Additional information on environmental fate and behaviour
- Ecotoxicological Summary
- Aquatic toxicity
- Endpoint summary
- Short-term toxicity to fish
- Long-term toxicity to fish
- Short-term toxicity to aquatic invertebrates
- Long-term toxicity to aquatic invertebrates
- Toxicity to aquatic algae and cyanobacteria
- Toxicity to aquatic plants other than algae
- Toxicity to microorganisms
- Endocrine disrupter testing in aquatic vertebrates – in vivo
- Toxicity to other aquatic organisms
- Sediment toxicity
- Terrestrial toxicity
- Biological effects monitoring
- Biotransformation and kinetics
- Additional ecotoxological information
- Toxicological Summary
- Toxicokinetics, metabolism and distribution
- Acute Toxicity
- Irritation / corrosion
- Sensitisation
- Repeated dose toxicity
- Genetic toxicity
- Carcinogenicity
- Toxicity to reproduction
- Specific investigations
- Exposure related observations in humans
- Toxic effects on livestock and pets
- Additional toxicological data
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
- Endpoint:
- biodegradation in water: ready biodegradability
- Data waiving:
- study technically not feasible
- Justification for data waiving:
- the study does not need to be conducted because the substance is inorganic
- Reason / purpose for cross-reference:
- data waiving: supporting information
- Endpoint:
- biodegradation in water: ready biodegradability
- Type of information:
- experimental study
- Adequacy of study:
- supporting study
- Study period:
- not specified
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- test procedure in accordance with generally accepted scientific standards and described in sufficient detail
- Reason / purpose for cross-reference:
- data waiving: supporting information
- Qualifier:
- no guideline followed
- Version / remarks:
- Medium according to OECD 301 was used.
- Principles of method if other than guideline:
- Alkaline cations were tested in different growth media using ion chromatography for the examination of their primary biodegradability.
- GLP compliance:
- no
- Specific details on test material used for the study:
- The experiments in this study refer to the anion of dicyanamide salts, in this case from potassium dicyanamide.
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge, industrial (adaptation not specified)
- Details on inoculum:
- - Source of inoculum/activated sludge: bacteria from an industrial waste water treatment plant (Merck KGaA factory, Darmstadt, Germany) were not cultivated but received from the plant directly
- T=20 °C, OECD test guideline 301 medium, 1 % bacteria suspension, C/N ratio 5 - Duration of test (contact time):
- ca. 28 d
- Initial conc.:
- ca. 100 µmol/L
- Based on:
- act. ingr.
- Remarks:
- ca. 9 mg/l
- Parameter followed for biodegradation estimation:
- test mat. analysis
- Details on study design:
- - The bacteria from an industrial waste water treatment plant (Merck KGaA factory, Darmstadt, Germany) were not cultivated but received from the plant directly and used within a limited time period of one week. It was taken there, transported in a 10-L container overnight and aerated with oxygen in our lab before use.
- OECD guideline 301 medium (OECD 1992)
- samples were taken at day 0, 14 and 28. - Preliminary study:
- not conducted
- Test performance:
- not specified
- Key result
- Parameter:
- % degradation (test mat. analysis)
- Value:
- >= 0
- Sampling time:
- 28 d
- Details on results:
- - industrial sewage sludge bacteria were not able to use the anions as carbon or nitrogen sources.
- There was no decrease in the relative concentration of N(CN)2−. - Validity criteria fulfilled:
- not applicable
- Interpretation of results:
- not readily biodegradable
- Conclusions:
- The dicyanamide anion was found to be not readily biodegradable.
- Executive summary:
Neumann et al. (2014) have examined the biodegradation of cyano-based ionic liquid anions, amongst these the N(CN)2−anion, under different conditions. In an assay using industrial activated sludge, the relative concentration of the N(CN)2−anion showed no significant decrease over a time period of 28 days. In consequence, anions like the dicyanamide anion are stated not to be readily biodegradable.
Referenceopen allclose all
Please see the attached figure which has been taken from the publication.
Description of key information
As an inorganic substance, sodium dicyanamide does not need to be tested for ready biodegradability according to REACh.
However, a publication exists which deals with the biodegradation of cyano-based ionic liquid anions, amongst these the N(CN)2−anion, where practically no biodegradation of the dicyanamide anion was observed when incubated in industrial activated sludge for 28 days (Neumann et al. 2014).
Key value for chemical safety assessment
- Biodegradation in water:
- under test conditions no biodegradation observed
Additional information
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.